Argonne

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Argonnes Rôle in ZEUS
José Repond Argonne National Laboratory
DOE Visit, Germantown, March 11th, 2004
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Question
What is Argonne's role in ZEUS?
Necessary ? What happens to ZEUS without ANL
participation? Unique ? Could any other
institution replace ANL? Impact on other ANL
projects ? Does participation in ZEUS help
with other ANL projects?
Review ANL contributions to ZEUS Overview of
current involvement Answer the question
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ANL contributions to ZEUS Hardware
Barrel Calorimeter
Description Uranium Scintillator sandwich
calorimeter 32 Modules each weighing 12 tons
Compensating ? worlds best hadronic energy
resolution Built by collaboration of 10 US
institutions Argonnes rôle Mechanical
design prototyping Cladding of Uranium
plates Fabrication of mechanical structures
Mechanical assembly tests Mounting of
electronics Tests with cosmic rays (all
modules) Installation in experiment
Commissioning of calorimeter Operation and
maintenance
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ANL contributions to ZEUS Hardware
Calorimeter FLT Processor
Description Receives input from calorimeter
regions Calculates various quantities
Total calorimeter energy Total
transverse energy ET Number of isolated
electrons Number of isolated muons
. Sends information to Global FLT
Extremely complex system Necessary component
for data taking Argonnes rôle Concept
Design Prototypes tests Fabrication
Commissioning Operation and maintenance
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ANL contributions to ZEUS Hardware
Barrel Presampler
Description Located in front of Barrel EM
Calorimeter Consisting of 32 cassettes with 13
tiles each Scintillator with fiber readout
into PMTs Argonnes rôle Proposal
Prototyping Design Fabrication
Installation Commissioning Operation and
maintenance Physics analysis
Electron energy corrections Hadron jet
energy correction Prompt photon physics
analysis
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ANL contributions to ZEUS Hardware
Small Rear Track Detector
Description Tracker in rear direction
Precision electron angle Scintillator
strips with fiber readout Argonnes rôle
Project management First level trigger
Design, prototyping and fabrication
Commissioning Physics analysis
Alignment F2(x,Q2) measurements
Operation and maintenance
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ANL contributions to ZEUS Hardware
Forward Straw Tube Tracker
Description Covers angles between 50 250
11040 tubes Reuse of existing rear-end
electronics (2000 channels) Argonnes rôle
Design Prototype Fabricate Test
Contribution to recent repair Continuous
support Physics analysis Development
of Kalman tracking filter Measurement of
charm production in forward direction
Front-end readout electronics
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ANL contributions to ZEUS Physics output
Physics chairman Physics group coordinators
Exotic searches Structure function
measurements Hadronic jets and QCD Members
in ZEUS editorial panel
Physics
Coordination
Diffraction
1/29 Structure Functions
5/22 Hadronic Jets and QCD
9/54 Heavy Flavors
1/13 Exotic Searches
0/18
Physics
Analysis
16/136 ZEUS physics papers with major Argonne
involvement
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ANL contributions to ZEUS Physics output
Selection of published ANL plots
Charm structure function 2004
Electroweak unification 1995
In collaboration with University of Wisconsin
In collaboration with University of Wisconsin
Pentaquark search 2004
Precision jet physics 2001
Diffractive cross sections 2002
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ANL contributions to ZEUS Management
Spokespersons
Deputy Rik Yoshida 2000 2002
Spokesperson Rik Yoshida
2003 2006
Calorimeter Barrel Presampler Small Angle Rear
Tracker Detector Calorimeter FLT Processor Run
Coordinators
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ANL contributions to ZEUS at present
Manpower 3.25 staff 2.0 retirees 2.0 students
Hardware
Calorimeter FLT Processor Small Angle Rear Track
Detector FLT Straw Tube Tracker Front-end
Electronics Barrel Presampler Calorimeter Shift
leaders
Argonne solely responsible
Major Argonne rôle
Physics Analysis
ANL initiative
Pentaquark searches Forward jet
measurements Charm jet in photoproduction Beauty
production cross sections Prompt photon
photoproduction
Coordination of QCD physics group Members in ZEUS
editorial board
Management
Given manpower limits very strong
contribution
Spokesperson until end of 2006
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Back to the question
What is Argonne's role in ZEUS?
Yes
Necessary? Without ANL
contributions, ZEUS drastically weakened
Hardware contributions
Maintenance of CFLTp and SRTD FLT probably not
possible Barrel presampler would be
turned of Conceivably the end of
ZEUS (and HERA?) Contribution to
running of experiment with shift leaders
Physics analysis Leadership of QCD
group would be significantly weakened
Two students left hanging Management
Rik would have to step down as
spokesperson
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Back to the question
What is Argonne's role in ZEUS?
Yes
Unique?
Excellent mechanical engineering
Assembly facilities Excellent
electronic engineering Coupled with

Long term commitment to experiment (other
people work on the LHC) Unique
knowledge of crucial components of ZEUS
Deep and broad understanding of physics (QCD)
Unique contributions to ZEUS in the PAST due to
Understanding of the underlying physics
Long expertise in building calorimeters
HRS EM, CDF EM, Soudan II, ZEUS, Minos, ATLAS,
LCD Expertise in Monte Carlo simulations
EGS for ZEUS, Geant4 for LCD
Expertise in photon/electron/jet
identification Prompt photon analysis
on CDF, ZEUS Jet physics on ZEUS
Heavy flavor physics on CDF, ZEUS Deep
understanding of QCD, DIS, etc
Unique contributions to ZEUS NOW due to
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Back to the question
What is Argonne's role in ZEUS?
Strong
Impact on other ANL projects?
CDF, ATLAS
Structure
Functions
Overlapping interest in Jet
physics
Heavy flavors
CTEQ Linear Collider
Detector RD Applying
expertise to development of hadron calorimeter
Strong ties with European groups
through HERA community Theory
group Common interest in
Quarkonia
Heavy flavor production
Jet physics
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Conclusions
Argonne's Role in ZEUS
Exceptionally strong ZEUS and HERA rely on
it Strong interaction with other ANL
projects Physics involvement necessary for
future projects Broadening the US HE physics
program